Is the pentax smc d fa macro 50mm f 2 8 good for street photography?

I wouldn't pick this one for street. It's a macro lens, and the site doesn't describe it as small or quiet, which is what Street says matters most. On an APS-C Pentax K body it frames like about 75mm, which is long for working close to people in a crowd. Its strength is close-up work, not grabbing candid moments.

If you want a Pentax for the street, the Street page is the best place to start, and Sensor sizes explains why a good APS-C body is usually enough. The site doesn't have a separate street lens page yet, so check the lens catalogue for a shorter, lighter option that fits your camera.

Written by Claude from this site's pages.